# InterSpec Radiation Analysis vs JExpress

The clearest difference is update cadence: JExpress at monthly against InterSpec Radiation Analysis's every 11 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

InterSpec Radiation Analysis ships an update every 11 months, JExpress monthly. The most recent releases landed on October 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | InterSpec Radiation Analysis | JExpress |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/interspec-radiation-analysis/id1447080767/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | Free | — |
| Size | 80 MB | 44 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [William Johnson](https://appshunter.io/developer/1447080766) | [Rubik Smart Solutions](https://appshunter.io/developer/1483981076) |

## What reviewers say

### InterSpec Radiation Analysis

[App page](https://appshunter.io/ios/app/interspec-radiation-analysis/id1447080767)

Analyze nuclear radiation spectral data to identify nuclides, determine source activity, and calculate shielding. Supports various detector file formats and includes tools for dose rate calculations and nuclide decay information.

**Highlights:** Spectral nuclear radiation data analysis, Nuclide identification, Source activity determination, Shielding amount calculation, Spectral file format conversion, Dose rate calculations, Interactive nuclide decay information

**Features:** macOS Compatibility

**In-app purchases:** none


### JExpress

[App page](https://appshunter.io/ios/app/jexpress/id1515004641)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is InterSpec Radiation Analysis free?

InterSpec Radiation Analysis is free to download, with no in-app purchases.

### Is JExpress free?

JExpress is free to download, with no in-app purchases.

### Do InterSpec Radiation Analysis or JExpress have ads?

Neither InterSpec Radiation Analysis nor JExpress shows ads.

### Which is updated more often, InterSpec Radiation Analysis or JExpress?

InterSpec Radiation Analysis ships an update every 11 months, and JExpress monthly. Most recently, InterSpec Radiation Analysis was updated on October 17, 2026 and JExpress on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*